Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Donald Alan Weimer, MD

Individual provider Orthopaedic Surgery Physician · NPI 1932152980

Dr. Donald Alan Weimer, MD is an Orthopedic Surgery in O Fallon, Illinois. Graduated from Medical College of Wisconsin in 1988, 38 years ago. Practices with Hshs Medical Group Inc, a 209-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
38
Trained at
Medical College of Wisconsin
Licensed in
IL
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1512 N Green Mount Rd Ste 300
O Fallon, IL 62269-1953
Phone: (618) 641-5800
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence 036101574 (IL)

Record details

NPI number1932152980
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 19, 2006
Last updated in NPPESAugust 20, 2015
Mailing address1512 N Green Mount Rd, Suite 300, O Fallon, IL 62269-1953

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolMEDICAL COLLEGE OF WISCONSIN
Graduated 1988 (38 years in practice)
Group practice Hshs Medical Group Inc — 209 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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